Abstract: A wheel is partly closed at one side by a hub cap (1) continuous with the rim (6) and is designed to receive an axle from the opposite side. According to the invention, the hub of the wheel consists of a plurality of ribs (14-17) which serve as bearing faces for the axle and whose geometric, axial elongations clear a plurality of spokes (2-5) forming the connection of the hub cap to the rim (6). This enables injection moulding in one operation with the simultaneous provision of an inside cavity behind the hub cap to receive a radially resilient and projecting bead (11) at the end of the axle.

Abstract: As a component for toy building sets there is provided a rotatable element comprising:(a) a base plate (FIGS. 1, 2, 6 and 7) and(b) a disc (FIGS. 3, 4 and 5) pivotally mounted in a circular aperture in the base plate.A socket for a pivot on the disc is located at the bottom of the base plate and is supported thereon by ribs integral with the socket and with four side walls at the bottom of the base plate.Four identical apertures in the bottom of the base plate are formed by the socket, the ribs and the side walls.Four engagement studs are provided on the top face of the disc and extend beyond the periphery thereof. The underface of these studs provides for slideable contact with the top face of the base plate during the rotation of the disc.